The wheel of a cart is making 5 revolutions per second. If the diameter of the wheel is
84 cm, find its speed in km/h. Give your answer, correct to the nearest km.
602
Answers
Answered by
4
47.52 km/h
Step-by-step explanation:
Number of revolutions in 1 second= 5
Number of revolutions in 1 hour
=5*60*60
=18000
Radius= 84/2= 42 cm
Distance covered in 1 revolution= 2πr
= 2*(22/7)*42
= 2*22*6
=264 cm
So,
Distance covered in 1 hour=18000*264
= 4752000 cm
= 47.52 km
Therefore,
Speed= 47.52 km/ 1 hour= 47.52 km/h
Similar questions